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Question: You have just read a long and rather difficult two-page text about fluctuations in the water level of a lake in Africa. You have to write a summary.How do you rate the usefulness of the following strategies for writing a summary of this two-page text? - I write a summary. Then I check that each paragraph is covered in the summary, because the content of each paragraph should be included.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
38 countries/ areas
Highlight:
1 Republic of Korea3.97
2 Finland3.55
3 Mexico3.52
4 Portugal3.51
5 Chile3.48
6 Estonia3.46
7 Japan 3.44
8 Hungary3.40
9 Ireland3.37
9 Spain3.37
11 Slovenia3.35
12 Sweden3.33
13 Australia3.32
14 Lithuania3.31
14 Turkiye3.31
16 Poland3.30
17 New Zealand3.29
17 United States3.29
19 Costa Rica3.24
20 Canada3.22
20 Switzerland3.22
22 United Kingdom3.19
23 Greece3.16
23 Italy3.16
25 Latvia3.15
26 Colombia3.14
27 Norway3.09
28 France3.08
29 Belgium3.04
29 Germany3.04
29 Israel3.04
32 Netherlands3.01
33 Denmark3.00
34 Austria2.99
34 Iceland2.99
36 Luxembourg2.97
37 Czech Republic2.87
38 Slovakia2.68

Note
The data of Azerbaijan are collected only in Baku. The data of China are collected only in Beijing, Shanghai, Jiangsu, and Zhejiang.

Source
OECD PISA 2018 Compendia

Correlations with major national performance indices
Life satisfaction (10 steps)
No. of data38
Regression equation
Y = -0.998712 X +9.937
Correlation coefficient (r)-0.354
Coefficient of determination (R2)0.125

GDP per capita (current US$)
No. of data38
Regression equation
Y = -29309.132589 X +139059.104
Correlation coefficient (r)-0.240
Coefficient of determination (R2)0.058

Life expectancy at birth - Both sexes (years)
No. of data38
Regression equation
Y = 0.570410 X +78.582
Correlation coefficient (r)0.050
Coefficient of determination (R2)0.003

Fertility rate, total (births per woman)
No. of data38
Regression equation
Y = -0.405308 X +2.889
Correlation coefficient (r)-0.304
Coefficient of determination (R2)0.092

Suicide - all ages (per 100,000 population)
No. of data38
Regression equation
Y = 7.047791 X -10.366
Correlation coefficient (r)0.297
Coefficient of determination (R2)0.088